Search found 30 matches

by Edward45
Sun Mar 21, 2021 5:14 pm
Forum: Lathe Work
Topic: Unimat drive belts.
Replies: 21
Views: 4697

Re: Unimat drive belts.

I have purchased the orange belts, but I'm inclined to think they are to rigid for the small distances between the pulley wheels. On my quite old Unimat 3 I've had to replace the spindle and bearing of the idler pulley, a weakness not helped by using rigid belts. As I don't like fiddling/modifying s...
by Edward45
Fri Mar 19, 2021 11:05 am
Forum: Lathe Work
Topic: Unimat drive belts.
Replies: 21
Views: 4697

Re: Unimat drive belts.

Sorry, not very good at this. I just logged in for 80mm dia Nitrile "O" Rings. It came up with a fairly comprehensive choice.
by Edward45
Thu Mar 18, 2021 2:31 pm
Forum: Lathe Work
Topic: Unimat drive belts.
Replies: 21
Views: 4697

Re: Unimat drive belts.

Belts arrived today, when measured they were about 4.9mm cross section. Very tight when first installed so ran the lathe whilst running the belt between my thumb and index finger to warm the belt up. Its now fine with no sign of slipping when turning items. We will see in the longer term but, it loo...
by Edward45
Wed Mar 17, 2021 4:59 pm
Forum: Lathe Work
Topic: Unimat drive belts.
Replies: 21
Views: 4697

Re: Unimat drive belts.

I measured my Unimat belts and concluded that they were 5mm cross section with 65mm and 75mm internal diameters. As the larger sizes appears to fail more frequently I have ordered 10 of these off ebay. I have made my own belts, but feel that the Nitrile belts are more flexible with a better grip.
by Edward45
Fri Feb 05, 2021 6:35 pm
Forum: Trains: Model and Prototype
Topic: GER Society list of 4mm models
Replies: 33
Views: 5510

Re: GER Society list of 4mm models

G K Chesterton - *If a thing is worth doing its worth doing badly". An awful lot of work has gone into this and having a go is important even if it doesn't satisfy everybody.
by Edward45
Mon Dec 21, 2020 9:49 pm
Forum: PeteT
Topic: J39 64859 Bachmann/Dave Bradwell
Replies: 107
Views: 24371

Re: J39 64859 Bachmann/Dave Bradwell

I understand that the radius was standard among the later NER engines. On the Isinglass j39 and Q7 drawings the height difference is quoted as 1ft, from this I would believe the radius to be that figure.
by Edward45
Tue Jul 14, 2020 5:23 pm
Forum: Jeremy Suter
Topic: Tips and tricks in machine tool practice
Replies: 79
Views: 23643

Re: Turning a chimney

Old HSS circular saw blades are a good source for parting off blades. Just chop up the saw blade into strips roughly the right size using a cutting disc in an angle grinder. Finish off to size using the bench grinder.
by Edward45
Fri Jun 19, 2020 1:54 pm
Forum: Paul Willis
Topic: Alan Gibson GER T26 (E4) kit build
Replies: 23
Views: 4398

Re: Alan Gibson GER T26 (E4) kit build

Firstly, and I have seen this mentioned elsewhere, the Alan Gibson kit completely omits the small splasher over the leading wheel. Secondly, no one appears to have mentioned Isinglass drawing No 457 for the class. Whilst Isinglass drawings are not always as sharp as some other drawings, No 457 has ...
by Edward45
Fri Jun 19, 2020 6:34 am
Forum: Paul Willis
Topic: Alan Gibson GER T26 (E4) kit build
Replies: 23
Views: 4398

Re: Alan Gibson GER T26 (E4) kit build

Firstly, and I have seen this mentioned elsewhere, the Alan Gibson kit completely omits the small splasher over the leading wheel. Secondly, no one appears to have mentioned Isinglass drawing No 457 for the class. Whilst Isinglass drawings are not always as sharp as some other drawings, No 457 has d...
by Edward45
Mon May 18, 2020 7:19 am
Forum: Painting and Weathering
Topic: Brass preparation for painting
Replies: 29
Views: 10422

Re: Brass preparation for painting

Has anyone ever used or had any experience of "Quickshine Brass & Copper Bath" ?
by Edward45
Tue May 12, 2020 9:07 am
Forum: Will L
Topic: Buck Jumping on Mass
Replies: 171
Views: 80268

Re: Buck Jumping on Mass

Will, surely you could have saved yourself a lot of problems, and indeed having to estimate, by obtaining the set of GERS/John Gardner drawings. Drawings L18 and L57 cover both versions of the J65. I'm sure that Lynn would have advised you accordingly.
by Edward45
Tue Mar 31, 2020 3:29 pm
Forum: Steam Locomotives
Topic: Motors for locos
Replies: 19
Views: 5535

Re: Motors for locos

At times there are also the 10mm sq motors, but as they are rated at about 7v they require some form of resistance. Theses are again very powerful for their size and if you are going to only use them for slow running applications they are well worth looking at.
by Edward45
Tue Mar 31, 2020 7:55 am
Forum: Steam Locomotives
Topic: Motors for locos
Replies: 19
Views: 5535

Re: Motors for locos

For motors possibly suitable for our applications search Micro electric motors on ebay. I believe the series 14 motors are Mitsumi motors with prices in the range of £1.60 to £1.80 for two. Mabuchi FF-050 series - be careful with rated voltage - are same depth and width as the Mitsumi but about 26mm...
by Edward45
Mon Mar 30, 2020 8:55 pm
Forum: Steam Locomotives
Topic: Motors for locos
Replies: 19
Views: 5535

Re: Motors for locos

From ebay over the years I have purchased - at very low prices - motors that appear in Hornby locos. A prime example is the five pole motor used in the J15 and I also believe the J50. The D16 has one type of three pole Mabuchi motor whilst the P2 and others have a larger Mabuchi equipped with a fly ...
by Edward45
Thu Mar 05, 2020 12:31 pm
Forum: Starting in P4
Topic: First chassis in P4
Replies: 49
Views: 11905

Re: First chassis in P4

Using collets on my Unimate and cheap Chinese centre drill - about £5.00 for 10 - followed by Tungsten carbide drill - from a similar source - drilled a 1mm hole down 1.5mm steel. Did it to fit one of these cheap motors with a 1mm shaft.
by Edward45
Sun Mar 01, 2020 1:39 pm
Forum: Exhibitions
Topic: Scalefour North 2020
Replies: 20
Views: 7981

Re: Scalefour North 2020

Maybe at bit dramatic, but any thoughts on not having the exhibition?
by Edward45
Tue Feb 04, 2020 4:33 pm
Forum: PeteT
Topic: J39 64859 Bachmann/Dave Bradwell
Replies: 107
Views: 24371

Re: J39 64859 Bachmann/Dave Bradwell

I have no experience with this make of wheel, but from what I can glean can't say that I'm overly impressed with the concept. However, when it comes to attempting to repair the wheel is it possible to vertically drill a hole in a suitable material to take the sub axle. With the wheel and the axle th...
by Edward45
Thu Jan 24, 2019 1:05 pm
Forum: Steam Locomotives
Topic: Some North Eastern & LNER Locomotive Builds
Replies: 237
Views: 70005

Re: Some North Eastern Locomotive Builds

Just a short addition. According to RCTS and Ken Hoole, the twelve J27 allocated to the former GE area were superheated version. These were constructed between Nov 1921 and Oct 1923. Significant details would be the extended smokebox and the tenders having the later version of underframe. Unlike the...
by Edward45
Sun Dec 16, 2018 9:44 am
Forum: Steam Locomotives
Topic: Some North Eastern & LNER Locomotive Builds
Replies: 237
Views: 70005

Re: Some North Eastern Locomotive Builds

I have no experience of the Bachmann Atlantics. In the case of the DJH Atlantics Alastar Rolfe admitted that he had modelled them overscale to overcome some of the "operational" issues. For example the tender frames and those of the loco trailing wheels are too deep. To compensate the buff...
by Edward45
Sat Dec 15, 2018 1:51 pm
Forum: Steam Locomotives
Topic: Some North Eastern & LNER Locomotive Builds
Replies: 237
Views: 70005

Re: Some North Eastern Locomotive Builds

Try "More 4mm Engines" by Guy Williams published by Wild Swan ISBN 1 874103 402.
by Edward45
Sun May 13, 2018 1:42 pm
Forum: Tools and Techniques
Topic: How not to break a 16BA Tap?
Replies: 24
Views: 8967

Re: How not to break a 16BA Tap?

If I were tapping into tube I would use my Unimat by disengaging the drive and turning by hand. Whilst not 16BA I have used this technique for tapping 14BA into steel when making up crankpin parts. Using the lathe ensures that any lateral pressure is minimised, and so far I haven't broken a tap. I'm...
by Edward45
Thu Jul 13, 2017 12:29 pm
Forum: Trains: Model and Prototype
Topic: Overheating Mashima 1224
Replies: 16
Views: 7643

Re: Overheating Mashima 1224

This is a shot in the dark. Remove the brushes and check that the shaft spins freely.
by Edward45
Tue Jul 11, 2017 8:17 am
Forum: Trains: Model and Prototype
Topic: Overheating Mashima 1224
Replies: 16
Views: 7643

Re: Overheating Mashima 1224

If possible I would be incline to take the motor apart and give it a thorough clean. The symptoms do look as if a short is occurring, worse case would be the windings, but a dirty/damaged commutator or brushes can also cause similar problems. In view of the age of the motor have you ever changed the...
by Edward45
Tue Mar 28, 2017 12:24 pm
Forum: Tools and Techniques
Topic: Thin files
Replies: 5
Views: 4088

Re: Thin files

A further experiment. Unless you have eyes like a hawk you will need to use a magnifying glass of some kind. Using a triangle diamond needle file, cut a row of closely spaced serrations to form a rather crude cutting edge. Just tried it.
by Edward45
Tue Mar 28, 2017 8:07 am
Forum: Tools and Techniques
Topic: Thin files
Replies: 5
Views: 4088

Re: Thin files

Clearly any thin metal file will do, and the cheaper the better. I only mentioned Wilko's as they were the cheapest I came across. I have an idea that Poundland, etc sold them at one time. Poundland do sell the cheap emery type that have other uses.

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